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<div class="chapter" lang="en">
<div class="titlepage"><div><div><h2 class="title">
<a name="gtk-migrating-GtkLinkButton"></a>Migrating from GnomeHRef to GtkLinkButton</h2></div></div></div>
<p>
    Since version 2.10, GTK+ provides the <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> widget as a
    replacement for the <span class="structname">GnomeHRef</span> widget
    in the libgnomeui library.
  </p>
<p>
    Porting an application from <span class="structname">GnomeHRef</span> to
    <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> is very simple. <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> does not have a
    default action for <a class="link" href="GtkButton.html#GtkButton-clicked" title='The "clicked" signal'><span class="type">"clicked"</span></a> signal. So instead of simply 
    creating the widget
    </p>
<div class="informalexample"><pre class="programlisting">
      GtkWidget *button;

      button = gnome_href_new (url, "");
    </pre></div>
<p>
    you will have to handle the activation of the <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a>, using
    the ::clicked signal for instance
    </p>
<div class="informalexample"><pre class="programlisting">
      static void
      link_button_clicked_cb (GtkWidget *widget,
                              gpointer   data)
      {
        const gchar *link;

	link = gtk_link_button_get_uri (GTK_LINK_BUTTON (widget));
	open_browser_at_url (link);
      }

      /* ... */
      
        GtkWidget *button;

	button = gtk_link_button_new (url);
	g_signal_connect (button, "clicked",
	                  G_CALLBACK (link_button_clicked_cb), NULL);
     </pre></div>
<p>
    If you have more than one <a class="link" href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> instead of connecting
    a signal to each one, you can use a "hook function" which will be
    called whenever a user activates a link button
    </p>
<div class="informalexample"><pre class="programlisting">
      static void
      link_button_hook (GtkLinkButton *button,
                        const gchar   *link,
			gpointer       user_data)
      
      {
        open_browser_at_url (link);
      }
      
      /* ... */
      
        GtkWidget *button1 = gtk_link_button_new (uri1);
	GtkWidget *button2 = gtk_link_button_new (uri2);

        gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
    </pre></div>
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